Assume an ADT Stack which consists of the following attributes: struct StackNode { int item; StackNode *next; }; StackNode *topPtr; Write the C++ implementation for method displayStack( ) that...

Assume an ADT Stack which consists of the following attributes: struct StackNode { int item; StackNode *next; }; StackNode *topPtr; Write the C++ implementation for method displayStack( ) that displays the stack content from top to bottom. Use below method header: void Stack::displayStack ()